Industrial trace dissolved oxygen sensor with stainless steel flow cell and installation fittings on a white background
Sper Scientific

870007-PWDO

Online Trace Dissolved Oxygen Sensor for High-Purity Water


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This industrial dissolved oxygen sensor monitors trace oxygen in high-purity water, boiler feedwater and power plant water systems.

Designed for low-level dissolved oxygen measurement, the sensor uses a polarographic electrode with a platinum cathode, silver/silver chloride anode and silicone rubber membrane. It detects oxygen concentrations as low as 0.1 µg/L at 20 °C, helping operators monitor water conditions in oxygen-sensitive processes.

A 316L stainless steel body and double-shielded 5 m cable suit industrial installations. Temperature compensation elements are available to match the connected analyzer. The sensor requires polarization before use and a continuous flow of sample water across the membrane.

Features

  • Trace dissolved oxygen measurement for high-purity water applications
  • Polarographic sensing with a platinum cathode and Ag/AgCl anode
  • Silicone rubber membrane supported by steel gauze
  • 316L stainless steel electrode body
  • Double-shielded 5 m cable
  • Temperature compensation options for compatible analyzers
Product 870007-PWDO
Measurement principle Polarographic
Published measuring ranges 0–100 µg/L; 0–20 mg/L
Detection limit 0.1 µg/L at 20 °C
Response time ≤3 minutes to 90% of final reading at 20 °C
Sample water temperature 0–60 °C
Electrode body 316L stainless steel
Electrolyte 0.1 M potassium chloride (KCl)
Membrane Silicone rubber with steel gauze
Temperature compensation options Pt100, Pt1000, 22 kΩ or 2.252 kΩ
Cable 5 m, double-shielded
Polarization voltage 0.7 V
Polarization time More than 8 hours
Minimum sample flow velocity 5 cm/s

Where is this sensor used?
It is intended for trace oxygen monitoring in thermal power plants, demineralized water systems and boiler feed water.

How long does the sensor need to polarize?
The specified polarization time is more than 8 hours.

Does the sample need to flow?
Yes. The specified minimum sample velocity is 5 cm/s across the sensing membrane.

How do I select the temperature compensation element?
Match it to your analyzer's input requirements. 


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